Gzip response in Flask/Tornado
The simplest way is to use Nginx, as Nikolay suggested. It won't add much overhead.
With tornado.web.Application, you can just pass compress_response=True when initializing the app. Since you're using a Flask, that won't work. You could look at the Tornado source and see what it's doing, but that won't be simple.
Assuming you want to reply to a post request then in your tornado.web.RequestHandler derived class, within the "def post(self):"
self.set_header("Content-type", 'text/plain') # or whatever you expectself.set_header("Content-Encoding", 'gzip')# don't forget to import zlibgzip_compress = zlib.compressobj(9, zlib.DEFLATED, zlib.MAX_WBITS | 16)# response is the string where your response iscontent = gzip_compress.compress(response) + gzip_compress.flush()compressed_content_length = len(content)self.set_header("Content-Length", compressed_content_length)self.write(content)